CN213076096U - Eccentric acetabular cup and artificial hip joint - Google Patents
Eccentric acetabular cup and artificial hip joint Download PDFInfo
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- CN213076096U CN213076096U CN202020884413.1U CN202020884413U CN213076096U CN 213076096 U CN213076096 U CN 213076096U CN 202020884413 U CN202020884413 U CN 202020884413U CN 213076096 U CN213076096 U CN 213076096U
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Abstract
The application provides an eccentric acetabular cup and an artificial hip joint, wherein the eccentric acetabular cup comprises an inner cup, an outer cup and an adjusting part; the outer layer cup is covered on the outer surface of the inner layer cup; the adjusting piece is used for connecting the inner layer cup and the outer layer cup and adjusting the eccentric position of the inner layer cup. The eccentric acetabular cup can realize personalized fine adjustment of the eccentric position aiming at different bone defect conditions.
Description
Technical Field
The application relates to the technical field of medical instruments, in particular to an eccentric acetabular cup and an artificial hip joint.
Background
At present, no uniform treatment method exists for treating bone defects in hip arthroplasty, generally comprises pressing bone grafting, autologous or allogeneic femoral head bone grafting, a cushion block, a concentric mortar cup, a reinforcing cup and the like, and the treatment methods have respective advantages and disadvantages. Among these, the use of concentric cups causes the center of rotation of the acetabulum to move upward, resulting in unequal arm of force and lower limb length.
Therefore, in order to solve the problem that the rotation center shifts up in the concentric mortar cup use, an eccentric mortar cup has appeared in the prior art, and this eccentric mortar cup can not increase the stress of acetabular bone, and simultaneously, this eccentric mortar cup enables the remaining bone bed in the bone defect position and is polished the back by the mortar cup file, host bone and porous mortar cup direct contact, and the bone length goes into the condition and initial stability is good.
Different patients have different bone defect conditions, the eccentric positions of the applicable cups are different, but the problem that the rotation center moves upwards is only relieved to a certain extent by the eccentric cups in the prior art, and the individualized fine adjustment cannot be met for different bone defect conditions of different patients.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the application is to provide an eccentric acetabular cup, which is used for realizing personalized fine adjustment of the eccentric position of the eccentric acetabular cup aiming at different bone defect conditions.
The embodiment of the application provides an eccentric acetabular cup, which comprises an inner cup, an outer cup and an adjusting part; the outer layer cup is covered on the outer surface of the inner layer cup; the adjusting piece is used for connecting the inner layer cup and the outer layer cup and adjusting the eccentric position of the inner layer cup.
In the implementation process, the eccentric acetabular cup is provided with the adjusting part, the adjusting part can adjust the eccentric position of the inner cup when the inner cup is connected with the outer cup, and further realize the position adjustment of the rotation center of the eccentric acetabular cup, so that the eccentric acetabular cup is suitable for different bone defect conditions of different patients, further realize the individualized fine adjustment of the eccentric acetabular cup, improve the bonding strength of the eccentric acetabular cup and host bones after being implanted, and further bring better treatment effect for the patients.
In a possible implementation manner, the adjusting piece is an adjustable screw which is arranged along the radial direction of the outer cup to connect the outer cup and the inner cup and is used for adjusting the eccentric position of the inner cup.
In the implementation process, the adjustable screw is used as an adjusting piece and sequentially penetrates through the outer-layer cup and the inner-layer cup along the radial direction of the outer-layer cup, so that the outer-layer cup and the inner-layer cup are connected. In addition, the tightness degree of the screw can be adjusted by rotating the screw, so that the eccentric position of the inner cup can be adjusted, the position of the rotating center of the eccentric acetabular cup can be adjusted, and the device is simple in structure and convenient to operate.
In one possible implementation, the number of the adjustable screws is multiple.
In the implementation process, the eccentric acetabular cup is provided with the adjustable screws, the adjustable screws are distributed at different positions on the outer cup, and the adjustable screws are matched with each other to adjust the eccentric position of the inner cup, so that the efficiency and the precision of eccentric position adjustment can be improved.
In one possible implementation, the eccentric acetabular cup further comprises a cement layer for filling a gap between the inner cup and the outer cup after the eccentric position of the inner cup is adjusted by the adjustable screw.
In the above-mentioned realization process, through the relative outer cup's of adjustable screw regulation inlayer cup position that sets up to the realization is to the regulation of the eccentric position of inlayer cup, can have the space between inlayer cup and the outer cup, through filling the bone cement layer in the space between inlayer cup and the outer cup, but the space between shutoff inlayer cup and the outer cup on the one hand after the bone cement layer solidifies, on the other hand can realize further fixed to inlayer cup and outer cup, improves the stability of eccentric acetabular cup structure.
In one possible implementation mode, the inner surface of the outer layer cup is attached to the outer surface of the inner layer cup; the number of the inner layer cups is multiple, and the eccentric positions of the inner layer cups are different; the adjusting piece is a protrusion and a groove which are arranged in a matched mode, and the outer layer cup and the inner layer cup are connected through the clamping of the protrusion and the groove.
In the implementation process, the outer cup and the inner cup are mounted in a fitting manner, namely the relative positions of the outer cup and the inner cup are fixed, further, one outer cup corresponds to a plurality of inner cups with different eccentric positions, and the eccentricity and the rotation center position of the eccentric acetabular cup can be adjusted by replacing different inner cups, so that the eccentric acetabular cup can be suitable for patients with different bone defect degrees, and the individualized fine adjustment of the eccentric position of the eccentric acetabular cup is realized.
In a possible implementation manner, the protrusion is arranged on the inner surface of the outer cup, and the groove is arranged on the outer surface of the inner cup.
In the implementation process, the bulge on the inner surface of the outer cup is matched and mounted with the groove on the outer surface of the inner cup to realize connection between the inner cup and the outer cup and replacement of the inner cup, the structure is simple, and the replacement operation is convenient.
In a possible implementation manner, the protrusion is arranged on the outer surface of the inner cup, and the groove is arranged on the inner surface of the outer cup.
In the implementation process, the bulge on the outer surface of the inner cup is matched and mounted with the groove on the inner surface of the outer cup to realize connection between the inner cup and the outer cup and replacement of the inner cup, the structure is simple, and the replacement operation is convenient.
In a possible realization mode, the eccentric positions of the inner layer cups are sequentially different by 0.5-5 mm.
In the implementation process, the eccentric positions of the inner layer cups are sequentially different by 0.5-5mm, so that the requirements of patients with different bone defect degrees can be met.
Embodiments of the present application further provide an artificial hip joint including the eccentric acetabular cup described in any of the above embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a block diagram of an eccentric acetabular cup according to an embodiment of the present disclosure;
FIG. 2 is a block diagram of another eccentric acetabular cup provided by embodiments of the present application.
Icon: 100-inner cup; 200-outer cup; 300-an adjustment member; 400-a layer of bone cement; 500-bump; 600-groove.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, fig. 1 is a structural diagram of an eccentric acetabular cup according to an embodiment of the present disclosure. The embodiment of the application provides an eccentric acetabular cup, which comprises an inner cup 100, an outer cup 200 and an adjusting piece 300; the outer cup 200 covers the outer surface of the inner cup 100; the adjusting member 300 serves to connect the inner cup 100 with the outer cup 200 and to adjust the eccentric position of the inner cup 100.
In the implementation process, the adjusting part 300 is arranged on the eccentric acetabular cup, the adjusting part 300 can adjust the eccentric position of the inner cup 100 while the inner cup 100 is connected with the outer cup 200, and further realize the position adjustment of the rotation center of the eccentric acetabular cup, so that the eccentric acetabular cup is suitable for different bone defect conditions of different patients, further realize the individualized fine adjustment of the eccentric acetabular cup, improve the bonding strength between the eccentric acetabular cup and host bones after being implanted, and further bring better treatment effect for the patients.
In one possible implementation, the adjusting member 300 is an adjustable screw disposed along a radial direction of the outer cup 200 to connect the outer cup 200 with the inner cup 100 and to adjust an eccentric position of the inner cup 100.
In the implementation process, an adjustable screw is used as the adjusting member 300, and the adjustable screw sequentially penetrates through the outer cup 200 and the inner cup 100 along the radial direction of the outer cup 200, so as to implement connection between the outer cup 200 and the inner cup 100. In addition, the screw can be rotated to adjust the eccentric position of the inner cup 100 and further adjust the position of the rotation center of the eccentric acetabular cup, and the structure is simple and the operation is convenient.
In one possible implementation, the number of adjustable screws is multiple.
In the implementation process, a plurality of adjustable screws are arranged on the eccentric acetabular cup and distributed at different positions on the outer cup 200, and the adjustable screws are matched with each other to adjust the eccentric position of the inner cup 100, so that the efficiency and the precision of eccentric position adjustment can be improved.
In one possible implementation, the eccentric acetabular cup further includes a cement layer 400, the cement layer 400 being used to fill in the gap between the inner cup 100 and the outer cup 200 after the eccentric position of the inner cup 100 is adjusted by means of adjustable screws.
In the implementation process, the arrangement position of the inner cup 100 relative to the outer cup 200 is adjusted through adjustable screws so as to adjust the eccentric position of the inner cup 100, a gap exists between the inner cup 100 and the outer cup 200, and the gap between the inner cup 100 and the outer cup 200 is filled with the bone cement layer 400, so that after the bone cement layer 400 is solidified, the gap between the inner cup 100 and the outer cup 200 can be blocked, on the other hand, the inner cup 100 and the outer cup 200 can be further fixed, and the stability of the eccentric acetabular cup structure is improved.
Referring to fig. 2, fig. 2 is a structural diagram of another eccentric acetabular cup provided in the embodiment of the present application, in a possible implementation manner, an inner surface of an outer cup 200 is mounted to an outer surface of an inner cup 100 in a fitting manner; the number of the inner layer cups 100 is multiple, and the eccentric positions of the inner layer cups 100 are different; the adjusting piece 300 is a protrusion 500 and a groove 600 which are arranged in a matching way, and the outer layer cup 200 and the inner layer cup 100 are connected through the clamping of the protrusion 500 and the groove 600.
In the implementation process, the outer cup 200 and the inner cup 100 are attached to each other, that is, the relative positions of the outer cup 200 and the inner cup 100 are fixed, further, one outer cup 200 corresponds to a plurality of inner cups 100 with different eccentric positions, and the eccentricity and the rotation center position of the eccentric acetabular cup can be adjusted by replacing different inner cups 100, so that the eccentric acetabular cup can be suitable for patients with different bone defect degrees, and the individualized fine adjustment of the eccentric position of the eccentric acetabular cup can be realized. The adjusting piece 300 is a protrusion 500 and a groove 600 which are matched with each other, the protrusion 500 and the groove 600 are matched with each other to realize the detachable connection of the outer cup 200 and the inner cup 100, the structure is simple, and the inner cup 100 is replaced through the protrusion 500 and the groove 600 which are matched with each other.
It is understood that the protrusion 500 and the groove 600 may be provided on the outer cup 200 or the inner cup 100, respectively.
In one possible implementation, the protrusions 500 are disposed on the inner surface of the outer cup 200 and the grooves 600 are disposed on the outer surface of the inner cup 100.
In the implementation process, the protrusion 500 on the inner surface of the outer cup 200 is matched and mounted with the groove 600 on the outer surface of the inner cup 100, so that the connection between the inner cup 100 and the outer cup 200 and the replacement of the inner cup 100 are realized, the structure is simple, and the replacement operation is convenient.
In one possible implementation, the protrusion 500 is disposed on the outer surface of the inner cup 100 and the recess 600 is disposed on the inner surface of the outer cup 200.
In the implementation process, the protrusion 500 on the outer surface of the inner cup 100 is matched and mounted with the groove 600 on the inner surface of the outer cup 200 to realize the connection between the inner cup 100 and the outer cup 200 and the replacement of the inner cup 100, and the structure is simple and the replacement operation is convenient.
In one possible implementation, the eccentric positions of the inner cups 100 differ by 0.5-5mm in sequence.
In the implementation process, the eccentric positions of the inner layer cups 100 are sequentially different by 0.5-5mm, so that the requirements of patients with different bone defect degrees can be met.
Embodiments of the present application further provide an artificial hip joint including the eccentric acetabular cup described in any of the above embodiments.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (9)
1. An eccentric acetabular cup, comprising: the inner layer cup, the outer layer cup and the adjusting piece;
the outer layer cup is covered on the outer surface of the inner layer cup;
the adjusting piece is used for connecting the inner layer cup and the outer layer cup and adjusting the eccentric position of the inner layer cup.
2. The eccentric acetabular cup of claim 1 wherein the adjustment member is an adjustable screw disposed radially of the outer cup to connect the outer cup to the inner cup and to adjust the eccentric position of the inner cup.
3. The eccentric acetabular cup of claim 2 wherein the number of adjustable screws is multiple.
4. The eccentric acetabular cup of claim 2 further comprising a layer of cement for filling a void between the inner cup and the outer cup after the eccentric position of the inner cup is adjusted by the adjustable screw.
5. The eccentric acetabular cup of claim 1 wherein an inner surface of the outer cup fits snugly against an outer surface of the inner cup;
the number of the inner layer cups is multiple, and the eccentric positions of the inner layer cups are different;
the adjusting piece is a protrusion and a groove which are arranged in a matched mode, and the outer layer cup and the inner layer cup are connected through the clamping of the protrusion and the groove.
6. The eccentric acetabular cup of claim 5 wherein the protrusion is disposed on an inner surface of the outer cup and the recess is disposed on an outer surface of the inner cup.
7. The eccentric acetabular cup of claim 6 wherein the protrusion is disposed on an outer surface of the inner cup and the recess is disposed on an inner surface of the outer cup.
8. The eccentric acetabular cup of claim 6 wherein the eccentric positions of the inner cups differ by 0.5-5mm in sequence.
9. An artificial hip joint comprising an eccentric acetabular cup according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020884413.1U CN213076096U (en) | 2020-05-22 | 2020-05-22 | Eccentric acetabular cup and artificial hip joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020884413.1U CN213076096U (en) | 2020-05-22 | 2020-05-22 | Eccentric acetabular cup and artificial hip joint |
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| Publication Number | Publication Date |
|---|---|
| CN213076096U true CN213076096U (en) | 2021-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020884413.1U Active CN213076096U (en) | 2020-05-22 | 2020-05-22 | Eccentric acetabular cup and artificial hip joint |
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| Country | Link |
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| CN (1) | CN213076096U (en) |
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- 2020-05-22 CN CN202020884413.1U patent/CN213076096U/en active Active
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